alireza1396 said

Some of my add-ons has been disabled

If an add-on is disabled because it is not compatible to the current version of Firefox, you have several choices.

1) Find another add-on that does the same job 2) Contact support for that add-on and see if there is an update 3) Do without 4) Downgrade your Firefox so that the add-on works

Separate Security Issue: Update your Flash Player Note: Windows users should download the ActiveX for Internet Explorer. and the plugin for Plugin-based browsers (like Firefox).

Note: Windows 8 and Windows 10 have built-in flash players and Adobe will cause a conflict. Install the plugin only. Not the ActiveX.

Flash Player Version: Version 27.0.0.130

https://get.adobe.com/flashplayer/ Direct link scans current system and browser Note: Other software is offered in the download. <Windows Only>

https://get.adobe.com/flashplayer/otherversions/ Step 1: Select Operating System Step 2: Select A Version (Firefox, Win IE . . . .) Note: Other software is offered in the download. <Windows Only> +++++++++++++++++++ See if there are updates for your graphics drivers https://support.mozilla.org/en-US/kb/upgrade-graphics-drivers-use-hardware-acceleration

You are using Firefox 57 according to the System Details list. Firefox 57 disables all legacy extensions by default, so you can only use WebExtensions.

Maybe use the current Firefox 56.0 release instead.

You can find the full version of the current Firefox release (56.0) in all languages and all operating systems here:

• https://www.mozilla.org/en-US/firefox/all/
• https://www.mozilla.org/en-US/firefox/notes/

You can consider to use the Firefox 52.3.0 ESR version if you can't use the current release. That way you will still receive security updates. If you need to use plugins other than Flash then install the 32-bit Firefox 52 ESR version.

• https://www.mozilla.org/en-US/firefox/organizations/all/
• https://www.mozilla.org/en-US/firefox/52.4.0/releasenotes/